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http://dx.doi.org/10.3795/KSME-A.2006.30.3.269

Fully Plastic Analyses of Unequally Notched Specimens in Bending Moment  

Oh Chang-Kyun (고려대학교 대학원 기계공학과)
Park Jin-Moo (고려대학교 기계공학과)
Kim Yun-Jae (고려대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.30, no.3, 2006 , pp. 269-278 More about this Journal
Abstract
This paper proposes slip line fields for bending of unequally notched specimens in plane strain that have a sharp crack in one side and a sharp V-notch in the other side. Depending on the back angle, two slip line fields are proposed, from which the limit moment and crack tip stress fields are obtained as a function of the back angle. Excellent agreement between slip line field solutions with those from detailed finite element limit analysis based on non-hardening plasticity provides confidence in the proposed slip line fields. One interesting point is that, for the unequally notched specimen, the difference between the crack tip triaxial stress for tension and that for bending increases significantly with increasing the back angle. This suggests that such a specimen could be potentially useful to investigate the crack tip constraint effect on fracture toughness of materials. In this respect, the possibility of designing a new toughness testing specimen with varying crack tip constraint is discussed.
Keywords
FE Limit Analysis; Slip Line Field Analysis; Unequally Notched Specimen;
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